In‐service bridge wires often fail prior to the design life subjected to alternating stresses and environmental erosion. In this paper, a novel corrosion fatigue test device, integrating fatigue testing machine and electrochemical accelerated corrosion assemblies, was developed to characterize the corrosion fatigue and electrochemical behaviour of the wires. Using the developed device, corrosion fatigue tests of corroded bridge wires under different corrosion and loading conditions were conducted. Electrochemical characteristics, corrosion fatigue behaviour, failure mechanism, and so forth were investigated according to electrochemical measurements, fracture morphologies and the lifetime of wires. Results evidence the synchronization of corrosion and fatigue and show the accelerated corrosion due to static and fatigue stresses. Additionally, cracking and fracture induced by multiple crack initiation was dominant in corrosion fatigue of corroded wires, and the coexistence of multiple corrosion pits decreased the lifetime significantly.

中文翻译：

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桥梁电缆用钢丝的腐蚀疲劳和电化学行为

使用中的桥线通常会在设计寿命之前因交变应力和环境腐蚀而失效。在本文中，开发了一种新颖的腐蚀疲劳测试设备，该设备将疲劳测试机和电化学加速腐蚀组件集成在一起，以表征导线的腐蚀疲劳和电化学行为。使用开发的设备，在不同的腐蚀和负载条件下进行了腐蚀的桥丝的腐蚀疲劳测试。根据电化学测量，断裂形态和导线寿命研究了电化学特性，腐蚀疲劳行为，破坏机理等。结果证明了腐蚀和疲劳的同步，并显示了由于静态和疲劳应力而加速的腐蚀。另外，